Your land has potential. Depending on its placement you may be able to get both wind as well as solar generated electricity. You mentione a stream. If the stream has its origins in a spring on the farm you are very luck. It will hopefully keep on flowing during the periods of drought that P.E. Is renouned for. The fact that the land has not been touched for so long is fantastic as you assured that indecticides and every other "cide" have not been used on the land is all that time. Link up to local farmers and they will tell you about stock sicknesses etc.predominant in the area and what to look out for. As for the farm being hilly...there's plenty of info on this site about berns and swales etc that will assist you. Keep on going a step at a time. You are building something very special for the future of your family. As you often heard on the radio in days gone by :Vasbyte!